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Document IIF

Vaporisation d'un écoulement de CO2 à l'intérieur de tubes à microcanaux. 2. Transfert de chaleur, chute de pression et corrélation.

Flow vaporization of CO2 in microchannel tubes. 2. Heat transfer, pressure drop, and correlation.

Auteurs : PETTERSEN J.

Résumé

Heat transfer coefficient and pressure gradient during flow vaporization of carbon dioxide was measured in an extruded microchannel tube with 25 flow channels with a diameter of 0.8 mm and a length of 0.5 m. Measurements were conducted at varying vapour fractions at temperatures ranging from 0 to 25 °C, mass flux from 190 to 570 kg.m-2.s-1, and heat flux from 5 to 20 kW.m-2. Frictional pressure drop data can be correlated well with an existing model developed for vertical flow. Heat transfer data can be correlated reasonably well with a combination of models for nucleate boiling, convective evaporation, dryout incipience, and post-dryout heat transfer. (See also this Bulletin, reference 2003-2204.)

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Pages : 2002-5

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Détails

  • Titre original : Flow vaporization of CO2 in microchannel tubes. 2. Heat transfer, pressure drop, and correlation.
  • Identifiant de la fiche : 2003-2203
  • Langues : Anglais
  • Date d'édition : 17/09/2002
  • Source : Source : Proc. 5th IIR-Gustav Lorentzen Conf. nat. Working Fluids, Guangzhou/ C. R. Conf. Guangzhou, IIF
    2002-5; sess. 1; pap. 11; 98-105; fig.; tabl.; 17 ref.

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